1999

7.1

2001

7.8

1993

6.7

2011

2.9

2013

5.8

1965

5.2

2013

5.2

2014

6.3

2013

6.7

1989

0.0

2012

7.0

1986

0.0

1994

4.0

1999

5.5

2011

0.0

2014

6.0

2017

5.7

2016

6.3

2016

6.3

2016

6.1